Pulp-engine



(No Modei.) I

A. J. SHIPT-ON.

Pulp Engine. 7 No. 239,350. Patanted March 29, 1881.

NITED STATES PATENT OFFICE;

AMBROSE J. SHIPTON, OF WATERTOWN, MASSAGHUSEITS.

PULP-ENGINE.

SPECIFICATION forming part of Letters Patent No. 289,350, dated March 29, 1881. Application filed February 21, 1881. (No model.)

To all whom z't may concern:

Be t known that I, AMBROSE J. SHIPTON, a, citizen of the United States, residing at Watertown, in the eounty of Middlesex and State of Massachusetts, beve invented certa-in new and useful lmprovements in Pulp-Engines, and that the saune are fully described in the followiug specification nnd illustrated in the accompanying drawings.

My improvements relate to that cluss of mechanism employed to reduce to a fine pulp fibrous matter of any char'acter, preparatory to converting it into paper or board. They are desigxied especially 1:0 prevent the pulp frmn being spattered over in front and rear or forced out at the end of the grindiug-roller, by reason of its rapid rotation.

My invention consists in a swingiug splashguard provided With a loose-j 01' ntloekin g-hin ge of peculiar construction, whereby the guard is free to Swing in all directions required in its use without unlocking; but when swung upwardly to a nearly vertical position it may be readily removed.

My inveution also consists in un end guard for the grinding-roller, eonsisting of a flange or collarformed on or attaehecbto the spindle, and a recess or cbamber in che curb adjoning tbe bearing for such collar to work in.

The drawings represent these feutures of m y nvention and the parts of the mechanism with whicb theyare combined and used,Figurel being a longitudinal vertical section, end Fig. 2 a transverse secton, of tbe rnachine. Fig. 3 is an enlarged viewof the end gu-ard of the roller, and Fig. 4 a detail view of the lockinghnges.

In the drawings, A is the tub-an oblong vat With vertical walls and rounded ends; and B, a central partition running about two-thirds of the leugth of the tub, end constituting a barrier around which the pulp is carried in a continuous current and over the incline G by the rotaton of the roller D. Ths roller, as indicated in Fig. 1, is a hezwy castng, furnished With a series of radial steel blades, d, termed- "fiy-bars, which, in their very rapid motion through the pulp, beat it up, grind it in its passage over tbe bed-plate E, filled With steel knves, and drive it forward, as deuoted by the arrows. A curb, E, covers tbe roller,

and lurgely prevents tbe pulp from being throwu out. These parts are all construeted in tbe usual way and arraug*ed in the ordiuary manner, the roller D being tirmly secured upon tbe spindle G, aml having proper beztrngs ai; eaeb side of the tub. 'lhe rapd moton of the blades d causes a disagreeable and wasteful spattering of the pulp below the curb at eacb end, since the hegbt of the pulp vares at dif- 6o ferent stages of its manipulation, ;1nd it frequently becomes necessary to free the pulp by a paddle from the front or rear of the roller, where .portions of it may be clogged and not unformly ground, becausenotcrculatingfreely. T0 prevent spattering at such times it is common to tack to the ends of the curb wide strips of coarse sail-cloth. This cloth, being constantly soaked in tbe pulp aud worn by its movement, is lable to tear away in peces or to sbred off at a time when the pulp is nearly ground, and thu-s the coarse peees or shreds of tbe canvas go with the pulp into the paper and render it defective and of low grade.

Thefirst part of my invention, therefore,consists in a rigid splash-guard, H, provided with locking-hinges I 6 J j, constructed as shown, and applied al; both its ends, connecting said guard to the curb. The hingesI are flat plates of cast metal secured to the ourb and having 8o ourved flanges i projecting inwardly and at each end tu rned upwardly so as to nearly meet, as shown. The part Jj is the comp'lement of the part I i, being secured to each end of the guard B, and having a projecting pivot, J, to ocoupy tbe center of the curved flange i, and a, shoulder, j, far enough removed from the pivot so that such curved flange masy occupy the space between them, With the shoulder close to its outer curve when che parts of the hinge are put together.

From this descripton, and from the drawings, t Will be plain that when the guard is in poston for use it will be free to swing through 7 more than one hundred end eighty degrees without the possibility of removal, and that it can only be detached. by swinging it up, as shown in dotted lines in Fig. 1. This gives a free movement in all directons required in use, and prevents accideutal displacement end mo possible drawing under the grinding-roller. The hinge-castings are adapted for use in the same manner both in front of and behnd the rol ler D.

The end guard for the roller D consists of a collar and flange, L, secured on the roller-spindle at the enter end of the roller, and a chamber, M, formed in or attached to the side of the curb, and having two vertical walls adjoinng the collar, one on each side of the flange L, so as to leave bui; anarrow space on either side. 'll1e bearing of the roller at this end s snpported on a lever, N, operated by a powerfnl screw, (net shown,) and the roller is gradually lowered as the grinding of the pnlp progresses, so that; nltmately che blades d in the periphery of the roller come almost or quite into contact With the knives in the bedplate E. (See Fig. 1.) Such movement Without a corresponding depression of the cpposite bearng of the spindle changes the plane of rotation of the flange L, and, hence, some space must be left; between such flange and the walls of the ehamber.

The chamber M is preferably of cast metal, secured by bolts or screws to the inside of the curb, abon t as shown. With the flange L extending into it, bnt very little of the pulp can ooze out around the spindle. I, however, provide port-holes or small openings O, throngh which, With a wire or hook, I remove, from time to time, such particles as work in. The chamber shelds che fibers from labilty to work pasti the flange, and permits such as enter it to drop down and agan enter the tub. Below the spindle che chambcr is a mere recess having a single vertical plate adjoning the flange L, and open to the tub, as shown.

I clain1 as of my invention- 1. The combination, With a swinging splashguard for pnlp-engnes, of a loose-joint lookng-hnge constructed With the curved flange and the pivot and shonlder, as shown, f0r the purposes set forth.

2. The adjustable grinding-roller D, having on ts spindle the collar and flange L, in combinaton With the double-walled charnber M,

arranged on the curb to receive the flange in its varying positions, for thepurpose set forth.

In testimony whereof I hereto aflx my sgnature in presence of two witnesses.

AMBROSE J. SHIPTON.

Wtnesses:

A. H. SPENCER, E. A. PHELPS. 

